Sonchus asper
Spiny-leaved sow thistle, Spiny sow thistle, Prickly sow thistle Taxonomy
Synonyms: Subspecific taxa: Classification:
Other taxonomic & nomenclature sources: USDA Plants;  ITIS;  The Plant List;  IPNI Images
   
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Species Distribution
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County Map Legend
Absent: Not known from county Medium confidence: Medium or unknown confidence; often old records or unverifiable observations Medium-high confidence: Often observations by expert botanists High confidence: Often vouchered herbarium records Planted / introduced: Native species introduced outside historic range, or only in planted locations within county (e.g., restorations) Historic / extirpated: Only historic records for the species; likely extirpated (Note that this category is not yet functional) North American distribution maps for this species: FLNA;  USDA Plants;  BONAP;  BISON
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Species Status
Status/Listing: No Information Notes: Origin: Europe
Species Description
General: Dicot-herb, annual Roots: Shoots: alternate leaf arrangment; simple leaf type; lobed (pinnately), parted (pinnately) leaf margin; Pinnate leaf venation; ovate leaf shape Inflorescence: head Flowers: perfect; 5 merous; complete, irregular; yellow; epigynous ovary position Fruit: achene Physiology: autotrophic; C3 C02 fixation Reproduction: sexual
Ecology & Natural History
Habitat: Species is distributed in waste places, gardens, about dwellings, barn yards, roadsides, along ditches, and railroads. ILPIN Notes: Stephens, H.A. 1980. Poisonous Plants of the Central United States. Regent Press of Kansas. Lawrence, KA. 165 pp. Leaf bases are clasping, the basal lobes are rounded about the stem. Young fleshy leaves in spring are cooked as greens. Species is naturalized from Europe. Functional Relationships:
Human Relationships:
Wildlife and Livestock Information:
Coefficient of Conservatism (C-value) [?] :
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